Tomcat Class Loader

Thu, 12 Jun 2003 11:58:52 -0700

Gentlemen,

 

I hope you will be able to assist me with a Tomcat Class Loader problem I am experiencing.  I am using:

  Apache Tomcat:  4.0.1

  JDK:  1.4.1_02

  Running on Windows 2000 Server.

 

I have the following  java code:

 

import java.util.*;

 

public class ActionFactory {

    private Hashtable actions = new Hashtable();

   

    // This method is called by the action sevlet

    public Action getAction(String classname,

                            ClassLoader loader)

                  throws IllegalAccessException,

                         InstantiationException {

       

        Class klass = null;

        System.out.println("Executing - ActionFactory");

        System.out.println("    ActionFactory - getAction");

        System.out.println("    AF getAction - classname:  " + classname);

       

        Action action = (Action)actions.get(classname);

        System.out.println("    getAction - got action:  " + action);

       

        if(action == null) {

            try {

                System.out.println("    getAction - loading action class");

                System.out.println("                loader: " + loader);

 

                klass = loader.loadClass(classname);

                System.out.println("    getAction - class loaded successfully");

            } catch (ClassNotFoundException cnfe) {

                System.out.println("    Couldn't find class:  " + classname);

                System.out.println("                  loader: " + loader);

                System.out.println("    " + cnfe.getMessage());

            }

           

            System.out.println("    getAction - creating new class instance");

            action = (Action)klass.newInstance();

            System.out.println("    getAction - adding action to actions table");

            actions.put(classname, action);

        }

       

        return action;

       

    } // getAction()

   

As you can see, I have placed a lot of extra line in the code that allow me to determine the source of the problem.

 

The following line, in the TRY block, seems to be the problem:

klass = loader.loadClass(classname);

 

In this line, "classname" = actions.ValidateURegFormAction.

 

I checked that the class exists in the /WEB-INF/class/actions directory.  However execution of this line never returns.  It seems that it stays trying to find and load the class.

 

Can you please assist with this problem.  Should I increase the value to wait before the request times out?  If so, how can I do this?  Do you have any suggestions?

 

 

Gabriel S. Lobo-Blanco
Idea Integration
1 Independent Drive Suite 206
Jacksonville, FL 32202
Direct: 904.360.2461
Fax: 904.360.2490
www.idea.com
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